Chemistry 2 Review

Front

Match the temperature of water with the time taken for potassium permanganate color to disappear: hot water, cold water, room temperature water.

Back

hot water = 2 mins; cold water = 10 mins; room temperature water = 3 mins

Front

All chemical equations adhere to the law of conservation of mass. According to this law, the number of atoms on the reactant side ___ the number of atoms on the product side. This means that the total mass of reactants ___ the total mass of products. The total amount of moles in the reactants compared to the total amount of moles in the products of a reaction ___ since some atoms may rearrange to form new products.

Back

is the same as; is the same as; may vary

Front

Process describing the melting of an ice cube in a closed system.

Back

isothermal

Front

What are the chemicals displayed on the left and right side of the arrow of this skeleton equation called? H₂ + O₂ → H₂O

Back

Reactants participate in a chemical reaction represented on the left side of an equation and produce products represented on the right side.

Front

Correct order of steps for titration experiment mimicking neutralization between gastric acid and antacid: 1. Record known concentration of NaOH and determine the volume of NaOH required to neutralize acid. 2. Observe pH indicator changing color. 3. Record known volume and concentration of HCl. 4. Add pH indicator. 5. Add NaOH to the acid.

Back

3, 4, 5, 2, 1

Front

A traveler notices a bag of mixed nuts inflates on a plane as pressure decreases from 101 kPa to 85 kPa. Which gas law explains this?

Back

Boyle’s law: as the pressure of a gas increases, the volume decreases

Front

The graph shows the relationship between the moles of a reactant and the moles of a product formed during a chemical reaction. Which line best depicts how the moles of one product formed could change as the moles of all the reactants are varied?

Back

Line D

Front

Pick the correctly balanced equation for the reaction of nitrogen with hydrogen to yield ammonia: N + H → NH, 2N + 3H → 3NH₂, N₂ + 3H₂ → 3NH₂, N₂ + 3H₂ → 2NH₃

Back

N₂ + 3H₂ → 2NH₃

Front

What is the standard enthalpy for the reaction 2H₂O(l) → 2H₂(g) + O₂(g) if the enthalpy of formation of water is -285.8 kJ/mol?

Back

571.6 kJ

Front

The figure shows the reaction of acetic acid in water. Identify the conjugate acid in this reaction.

Back

hydronium ion